{"id":666,"sequence":"GLTGPIGPPGPAGAPGDKGESGPSGPAGPTGAR","proforma":"[Oxidation]^2?GLTGPIGPPGPAGAPGDKGESGPSGPAGPTGAR","modifications":[{"name":"Oxidation","count":2,"n_term":false,"unimod":35,"position":null,"residues":"P"}],"mods_ambiguous":false,"neutral_mass":2868.4002126937,"mh":2869.40749,"url":"https://www.msipep.com/peptide/666/"}